Select Output

In a Select Output exercise, students are asked to select the output generated
by a given block of code. Select Output exercises require an output block
(because the output block is the correct solution), and a distractor_output
field. In a sense, Select Output is the reverse of a Select
Code exercise. In fact, all it takes to
convert a Select Code exercise to a Select Output exercise is to remove or
comment the distractor_code field and add a distractor_output field.